.app {
  width: 80%;
  display: flex;
  margin: 0 auto;
  flex-wrap: wrap;
}

header {
  width: 100%;
}
/* 【1】header */
/* 1.1 导航条 */
header > nav {
  display: flex;
  height: 90px;
  color: white;
  justify-content: space-between;
  padding-top: 15px;
}
header > nav {
  font-size: 24px;
  font-weight: 600;
}
.other {
  font-size: 17px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.other :nth-child(2) {
  padding: 0 33px;
}
/* 1.2 导入轮播图 */
/* 1.3 广告 */
.advertisement {
  width: 100%;
  height: 60px;
  background-color: rgb(12, 36, 97);
  margin-top: 15px;
  border-radius: 15px;
}
.advertisement a {
  font-size: 24px;
  /* 取消下划线 */
  text-decoration: none;
  color: white;
  line-height: 60px;
  padding-left: 30px;
}

/* 【2】main */
main {
  width: 100%;
}
.goods {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

/* footer */
footer {
  width: 100%;
  height: 285px;
  background-color: rgb(12, 36, 97);
  margin-top: 40px;
}
.introduce {
  width: 80%;
  height: 100%;
  display: flex;
  margin: 0 auto;
}
.introduce a,
.introduce p {
  color: white;
  font-weight: 700;
  padding: 5px 0;
}
.share,
.more,
.about {
  display: flex;
  flex-direction: column;
  margin-right: 30px;
}
.share :nth-child(1),
.more :nth-child(1),
.about :nth-child(1) {
  margin: 20px 0;
}
